Name
who — stdin stdout - file -- opt --help --version
Synopsis
who [options
] [filename
]
The who
command lists all
logged-in users, one user shell per line:
$ who smith pts/0 Sep 6 17:09 (:0) barrett pts/1 Sep 6 17:10 (10.24.19.240) jones pts/2 Sep 8 20:58 (192.168.13.7) jones pts/4 Sep 3 05:11 (192.168.13.7)
Normally, who
gets its data
from the file /var/run/utmp.
The filename
argument can specify a
different data file, such as /var/log/wtmp for past logins or
/var/log/btmp for failed
logins.[17]
Useful options
|
Print a row of headings as the first line. |
|
For remotely logged-in users, print the hostnames of origin. |
|
Also print each user’s idle time at his/her terminal. |
|
Also indicate whether
each user’s terminal is writable (see |
|
Display information only about yourself, i.e., the user associated with the current terminal. |
|
Quick display of
usernames only, and a count of users. Much like the |
[17] If your system is configured to log this information.
Get Linux Pocket Guide, 2nd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.